US9351735B2 - Insertion device and insertion method of coil - Google Patents

Insertion device and insertion method of coil Download PDF

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Publication number
US9351735B2
US9351735B2 US12/995,113 US99511309A US9351735B2 US 9351735 B2 US9351735 B2 US 9351735B2 US 99511309 A US99511309 A US 99511309A US 9351735 B2 US9351735 B2 US 9351735B2
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delivery wire
catheter
driving unit
predetermined
insertion force
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US20110077681A1 (en
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Yoshitaka Nagano
Yukihiro Nishio
Takayoshi Ozaki
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NTN Corp
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NTN Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
    • A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
    • A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
    • A61B17/1214—Coils or wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0113—Mechanical advancing means, e.g. catheter dispensers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M25/09041—Mechanisms for insertion of guide wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00367—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
    • A61B2017/00398—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like using powered actuators, e.g. stepper motors, solenoids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B2017/1205—Introduction devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/061—Measuring instruments not otherwise provided for for measuring dimensions, e.g. length
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/70—Manipulators specially adapted for use in surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0048—Detecting, measuring or recording by applying mechanical forces or stimuli
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0048—Detecting, measuring or recording by applying mechanical forces or stimuli
    • A61B5/0053—Detecting, measuring or recording by applying mechanical forces or stimuli by applying pressure, e.g. compression, indentation, palpation, grasping, gauging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0048—Detecting, measuring or recording by applying mechanical forces or stimuli
    • A61B5/0057—Detecting, measuring or recording by applying mechanical forces or stimuli by applying motion other than vibrations, e.g. rolling, rubbing, applying a torque, tribometry

Definitions

  • the present invention relates to an insertion device and an insertion method of a coil. Particularly, the present invention relates to the technique of inserting a coil attached to the tip of a delivery wire for embolization treatment of a cerebral aneurysm.
  • FIG. 12 shows a medical instrument employed in the coil embolization treatment of a cerebral aneurysm that is the cause of subarachnoid bleeding.
  • a platinum coil for coil embolization is attached to the head of a delivery wire.
  • This delivery wire and a catheter are inserted into a Y connector.
  • the catheter is hollow.
  • the delivery wire is inserted in the hollow region of the catheter. The surgeon manipulates the delivery wire and catheter in the proximity of the entrance of the Y connector.
  • Patent Document 1 Japanese Patent Laying-Open No. 2000-42116
  • Patent Document 2 Japanese Patent Laying-Open No. 2001-157662
  • the surgeon operates the manipulation unit of the master unit.
  • a roller or sphere at the slave unit is rotated by a motor or the like corresponding to the movement of the manipulation unit at the master unit.
  • the insertion force detected at the slave is applied as a sense of force for the operator of the master unit at the master slave apparatus.
  • One possible approach to avoid excessive insertion force of the delivery wire is to increase the sense of force for the operator.
  • the present invention is directed to solving the problem set forth above.
  • An object of the present invention is to insert a coil with favorable accuracy.
  • An insertion device of a coil is directed to an insertion device of a coil attached to the tip of a delivery wire.
  • the insertion device includes a first driving unit moving a catheter into which a delivery wire is inserted, a second driving unit moving the delivery wire, and a control unit controlling the second driving unit so as to insert the delivery wire by a predetermined insertion force, and controlling the first driving unit such that the catheter is advanced after the catheter is moved back if the delivery wire cannot be inserted under a state where the second driving unit is controlled so as to insert the delivery wire by the predetermined insertion force, and controlling the second driving unit such that the delivery wire is inserted by the predetermined insertion force after the catheter is advanced.
  • the delivery wire is inserted by a predetermined insertion force. If the delivery wire cannot be inserted, the catheter is moved back, and then advanced. Accordingly, the position of the tip of the catheter in the aneurysm can be changed. Subsequently, the delivery wire is inserted. Therefore, the aneurysm can be filled evenly with the coil. As such, the catheter and delivery wire can be inserted automatically without depending on the manipulation by a surgeon or the like while the insertion force of the delivery wire is controlled with favorable accuracy as compared to the case where insertion is carried out manually. As a result, the wire provided at the tip of the delivery wire can be inserted with favorable accuracy.
  • control unit controls the first driving unit and the second driving unit such that the delivery wire is advanced while the catheter is retreated, and the delivery wire is retreated while the catheter is advanced.
  • the delivery wire is advanced during moving back of the catheter. Therefore, the delivery wire can be prevented from moving back in conjunction with the catheter. Further, the delivery wire is moved back during advancement of the catheter. Accordingly, the delivery wire can be prevented from advancing in conjunction with the catheter. Thus, the position of the coil can be maintained.
  • control unit increases the distance of moving back and advancement of the catheter if moving back and advancement of the catheter are repeated by a predetermined number of times.
  • the moving back and advancement of the catheter is repeated for the predetermined number of times according to the configuration, it is likely that the bending of the catheter is merely spread by the catheter being moved back, and the position of the tip of the catheter in the aneurysm has not changed.
  • the distance of moving back and advancement of the catheter is increased so that the catheter is moved more than the bending of the catheter. Accordingly, the position of the tip of the catheter in the aneurysm can be changed. Then, the delivery wire is inserted.
  • the aneurysm can be filled evenly with the coil.
  • control unit stops insertion of the delivery wire when the distance of moving back and advancement the catheter reaches a predetermined distance.
  • the tip of the catheter exiting from the aneurysm when the distance of moving back and advancement of the catheter reaches the predetermined distance.
  • a determination is made that insertion of the coil is not possible, and insertion of the delivery wire, i.e. insertion of the coil, is stopped. This prevents the tip of the catheter from exiting from the aneurysm.
  • control unit reduces the insertion force of the delivery wire when the speed of inserting the delivery wire is higher than a predetermined speed.
  • This configuration allows the insertion force of the delivery wire to be reduced when the speed of inserting the delivery wire exceeds a predetermined speed. Accordingly, slippage between the delivery wire and the roller feeding out the delivery wire can be suppressed. Therefore, the inserted length of the delivery wire can be calculated with favorable accuracy based on the number of rotations of the roller, or the like.
  • control unit stops insertion of the delivery wire when the inserted length of the delivery wire reaches a predetermined length.
  • the configuration allows insertion of the delivery wire to be stopped when the inserted length of the delivery wire reaches the predetermined length. Accordingly, the entire length of the coil inserted in the aneurysm can be controlled with favorable accuracy.
  • the second driving unit drives the delivery wire through the rotation of a motor.
  • the control unit calculates the insertion force of the delivery wire from at least one of a current value of the motor and a bending degree of the delivery wire.
  • the configuration allows the insertion force of the delivery wire to be calculated with favorable accuracy from the current value of the motor driving the delivery wire or the bending degree of the delivery wire.
  • the insertion device further includes, instead of the control unit, a device controlling the first driving unit and the second driving unit according to manipulation by the operator.
  • the configuration allows the catheter and delivery wire to be inserted reflecting manipulation by a surgeon, for example, according to the status.
  • insertion of a coil provided at the tip of a delivery wire can be performed with favorable accuracy.
  • FIG. 1 represents a schematic configuration of an insertion device of a coil.
  • FIG. 2 is a perspective view of a delivery wire driving unit.
  • FIG. 3 is a flowchart of the control structure of a program executed by a control circuit according to a first embodiment.
  • FIG. 4 is a (first) diagram representing a platinum coil and a secondary catheter.
  • FIG. 5 is a (second) diagram representing a platinum coil and a secondary catheter.
  • FIG. 6 is a (third) diagram representing a platinum coil and a secondary catheter.
  • FIG. 7 is a flowchart of the control structure of a program executed by a control circuit according to a second embodiment.
  • FIG. 8 is a flowchart of the control structure of a program executed by a control circuit according to a third embodiment.
  • FIG. 9 is a flowchart of the control structure of a program executed by a control circuit according to a fourth embodiment.
  • FIG. 10 is a sectional view of a bending measurement instrument.
  • FIG. 11 represents a schematic configuration of an insertion device of a coil to which a master device is connected.
  • FIG. 12 represents a medical instrument employed in coil embolization treatment.
  • an insertion device of a coil includes a delivery wire driving unit 10 , a secondary catheter driving unit 20 , and a control circuit 30 .
  • the present embodiment will be described based on an insertion device as a medical instrument employed in the coil embolization treatment of an aneurysm 42 developed at a blood vessel 40 in the brain.
  • the application of the insertion device is not limited to the coil embolization treatment of an aneurysm 42 .
  • a platinum coil 100 for coil embolization is attached at the tip of a delivery wire 110 .
  • Delivery wire 110 and a catheter 120 are inserted in Y connectors 131 and 132 , respectively.
  • Catheter 120 includes a primary catheter 122 and a secondary catheter 124 .
  • Primary catheter 122 and secondary catheter 124 are hollow.
  • Secondary catheter 124 is inserted in the hollow region of primary catheter 122 .
  • Delivery wire 110 is inserted in the hollow region of secondary catheter 124 .
  • a delivery wire driving unit 10 is provided in the proximity of the entrance of Y connector 131 such that delivery wire 110 is advanced and moved back.
  • Delivery wire driving unit 10 includes a pressing roller 12 , a feeding roller 14 , and a motor 16 , as shown in FIG. 2 .
  • Feeding roller 14 is coupled to motor 16 .
  • Feeding roller 14 is preferably coupled directly to the rotor of motor 16 without any speed reducer or the like.
  • Motor 16 is driven by a current supplied from a constant current source 140 .
  • the driving force of motor 16 i.e. the insertion force of platinum coil 100 (delivery wire 110 ) is determined according to the value of the current of motor 16 . Therefore, in the present embodiment, the insertion force of platinum coil 100 (delivery wire 110 ) is determined by defining the current value of motor 16 .
  • Control circuit 30 calculates the insertion amount (travel distance) of delivery wire 110 by multiplying the circumference of feeding roller 14 by the number of rotations of feeding roller 14 , for example.
  • Secondary catheter driving unit 20 has a configuration similar to that of delivery wire driving unit 10 . Secondary catheter driving unit 20 is provided in the proximity of the entrance of Y connector 132 such that secondary catheter 124 is advanced and moved back.
  • Control circuit 30 controls delivery wire driving unit 10 and secondary catheter driving unit 20 so as to move delivery wire 110 and secondary catheter 124 in a predetermined manner.
  • control circuit 30 controls delivery wire driving unit 10 and secondary catheter driving unit 20 such that delivery wire 110 is moved by a predetermined insertion force to insert platinum coil 100 into aneurysm 42 by executing a program stored in a storage medium such as a ROM (Read Only Memory), CD (Compact Disc), DVD (Digital Versatile Disc), and the like.
  • a storage medium such as a ROM (Read Only Memory), CD (Compact Disc), DVD (Digital Versatile Disc), and the like.
  • An insertion force of delivery wire 110 is set at an optimum value to allow platinum coil 100 in aneurysm 42 to be inserted into aneurysm 42 without damage to blood vessel 40 , taking into account the flexibility of blood vessel 40 , and the like.
  • control circuit 30 of the present embodiment A control structure of a program executed by control circuit 30 of the present embodiment will be described with reference to FIG. 3 .
  • control circuit 30 sets the current value of motor 16 of delivery wire driving unit 10 , i.e. the torque of motor 16 , such that delivery wire 110 is inserted into secondary catheter 124 by a predetermined insertion force.
  • control circuit 30 determines the rotating speed of feeding roller 14 of delivery wire driving unit 10 , i.e. whether the inserting speed of delivery wire 110 is zero or not.
  • control proceeds to S 22 ; otherwise (NO at S 20 ), control proceeds to S 30 .
  • control circuit 30 sets the current value of motor 16 of delivery wire driving unit 10 , i.e., the torque, at zero.
  • control circuit 30 controls secondary catheter driving unit 20 such that secondary catheter 124 is moved back by just a predetermined distance.
  • control circuit 30 controls secondary catheter driving unit 20 such that secondary catheter 124 is advanced by just the predetermined distance, preferably, a distance equal to the moved back distance.
  • control circuit 30 determines whether the inserted length of delivery wire 110 has reached a predetermined length. When the inserted length of delivery wire 110 reaches the predetermined length (YES at S 30 ), control proceeds to S 40 ; otherwise (NO at S 30 ), control returns to S 20 .
  • control circuit 30 stops insertion of delivery wire 110 .
  • the current value of motor 16 of delivery wire driving unit 10 i.e. the torque of motor 16 , is set such that delivery wire 110 is inserted at a predetermined insertion force (S 10 ).
  • delivery wire 110 can be inserted automatically without having to depend on manipulation by a surgeon or the like. Therefore, delivery wire 110 can be inserted while the insertion force of delivery wire 110 is controlled with favorable accuracy as compared to the case where insertion is carried out manually by a surgeon or the like. As a result, insertion of platinum coil 100 provided at the tip of delivery wire 110 can be performed with favorable accuracy without excessive insertion force applied to aneurysm 42 .
  • the inserting resistance is increased according to the amount of platinum coil 100 present in aneurysm 42 .
  • the rotating speed of feeding roller 14 of delivery wire driving unit 10 i.e. the inserting speed of delivery wire 110 , becomes zero (YES at S 20 ), as shown in FIG. 4 .
  • the current value of motor 16 of delivery wire driving unit 10 i.e. the torque
  • the torque is set at zero (S 22 ).
  • insertion of delivery wire 110 is temporarily stopped.
  • secondary catheter driving unit 20 is controlled such that secondary catheter 124 is moved back by just a predetermined distance (S 24 ).
  • secondary catheter driving unit 20 is controlled such that secondary catheter 124 advances by just a predetermined distance (S 26 ).
  • S 26 a predetermined distance
  • the current value of motor 16 of delivery wire driving unit 10 i.e. the torque of motor 16 , is set such that delivery wire 110 is inserted by a predetermined insertion force (S 10 ).
  • the length of platinum coil 100 inserted into aneurysm 42 is determined. Therefore, when the inserted length of delivery wire 110 reaches a predetermined length (YES at S 30 ), insertion of delivery wire 110 is stopped (S 40 ).
  • a second embodiment of the present invention will be described hereinafter.
  • the present embodiment differs from the previous first embodiment in that, if delivery wire 110 cannot be inserted into aneurysm 42 even after repeating moving back and advancement of secondary catheter 124 by a predetermined number of times, the distance of moving back and advancement of secondary catheter 124 is increased.
  • the remaining structure is identical to that of the first embodiment set forth above. Therefore, detailed description thereof will not be repeated.
  • control circuit 30 A control structure of the program executed by control circuit 30 according to the present embodiment will be described hereinafter with reference to FIG. 7 .
  • the processes identical to those in the program of the previous first embodiment have the same step number allotted. Therefore, detailed description thereof will not be repeated.
  • control circuit 30 determines whether moving back and advancement of secondary catheter 124 have been repeated for a predetermined number of times. If moving back and advancement of secondary catheter 124 have been repeated for a predetermined number of times (YES at S 50 ), control proceeds to S 52 ; otherwise (NO at S 50 ), control proceeds to S 24 .
  • control circuit 30 increases the distance of moving back and advancement of secondary catheter 124 by just a predetermined distance.
  • control circuit 30 determines whether the distance of moving back and advancement of secondary catheter 124 have reached a predetermined length or not. When the distance of moving back and advancement of secondary catheter 124 has reached a predetermined length (YES at S 54 ), control proceeds to S 40 ; otherwise (NO at S 54 ), control proceeds to S 24 .
  • Secondary catheter 124 has a length of approximately 1 to 2 m. Therefore, there may be a case where the bending of secondary catheter 124 is only stretched and the tip thereof will not move even if secondary catheter 124 is moved back. There may also be the case where the moving amount of secondary catheter 124 , even if the tip moves, is trivial. In this case, it is possible that, when secondary catheter 124 are advanced, the tip portion of secondary catheter 124 is located at the same position again. Delivery wire 110 cannot be inserted in either case.
  • secondary catheter driving unit 20 is controlled such that secondary catheter 124 is moved back by just the predetermined distance (S 24 ). Further, secondary catheter driving unit 20 is controlled such that secondary catheter 124 is advanced by just a predetermined distance (S 26 ).
  • the position of the tip of secondary catheter 124 in the aneurysm can be altered. Then, the current value of motor 16 of delivery wire driving unit 10 , i.e. the torque of motor 16 , is set such that delivery wire 110 is inserted by a predetermined insertion force (S 10 ). Thus, the aneurysm can be filled evenly with platinum coil 100 .
  • a third embodiment of the present invention will be described hereinafter.
  • the present embodiment differs from the previous first and second embodiments in that delivery wire 110 is advanced while secondary catheter 124 is moved back, and delivery wire 110 is moved back while secondary catheter 124 is advanced.
  • the remaining configuration is similar to that of the previous first or second embodiment. Therefore, detailed description thereof will not be repeated.
  • control circuit 30 A control structure of the program executed by control circuit 30 according to the present embodiment will be described with reference to FIG. 8 .
  • the processes identical to those in the program of the previous first embodiment have the same step number allotted. Therefore, detailed description thereof will not be repeated.
  • control circuit 30 controls secondary catheter driving unit 20 and delivery wire driving unit 10 such that secondary catheter 124 is moved back by just a predetermined distance, and delivery wire 110 is advanced while secondary catheter 124 is moved back.
  • control circuit 30 controls secondary catheter driving unit 20 and delivery wire driving unit 10 such that secondary catheter 124 is advanced by just a predetermined distance, preferably a distance equal to the moved back distance, and delivery wire 110 is moved back while secondary catheter 124 is advanced.
  • secondary catheter driving unit 20 and delivery wire driving unit 10 are controlled such that secondary catheter 124 is advanced by just a predetermined distance, and delivery wire 110 is moved back while secondary catheter 124 is advanced (S 62 ).
  • platinum coil 100 can be located inside secondary catheter 124 when secondary catheter 124 is advanced. Thus, the position of platinum coil 100 can be maintained.
  • a fourth embodiment of the present invention will be described hereinafter.
  • the present embodiment differs from the previous first to third embodiments in that the insertion force of delivery wire 110 is reduced when the rotating speed of feeding roller 14 of delivery wire driving unit 10 , i.e. the inserting speed of delivery wire 110 , is higher than a predetermined speed.
  • the remaining configuration is similar to one of the previous first to third embodiments. Therefore, detailed description thereof will not be repeated.
  • control circuit 30 of the present embodiment A control structure of the program executed by control circuit 30 of the present embodiment will be described hereinafter with reference to FIG. 9 .
  • the processes identical to those in the program of the previous first embodiment have the same step number allotted. Therefore, detailed description thereof will not be repeated.
  • control circuit 30 determines whether the rotating speed of feeding roller 14 of delivery wire driving unit 10 , i.e. the inserting speed of delivery wire 110 , is higher than a predetermined speed or not.
  • the rotating speed of feeding roller 14 of delivery wire driving unit 10 is higher than the predetermined speed (YES at S 70 )
  • control proceeds to S 72 ; otherwise (NO at S 70 ), control proceeds to S 20 .
  • control circuit 30 reduces the current value of motor 16 , i.e. the insertion force of delivery wire 110 , by just a predetermined value.
  • delivery wire 110 In the case where the inserting resistance of delivery wire 110 is extremely low as compared with the insertion force when delivery wire 110 is to be inserted, delivery wire 110 will be inserted at high speed. If the rotating speed of feeding roller 14 of delivery wire driving unit 10 is high, the travel of delivery wire 110 cannot follow the rotation, causing the occurrence of slippage between delivery wire 110 and feeding roller 14 .
  • a fifth embodiment of the present invention will be described hereinafter.
  • the present embodiment differs from the previous first to fourth embodiments in that the insertion force of delivery wire 110 is obtained based on the bending degree of delivery wire 110 .
  • the remaining configuration is similar to one of the previous first to fourth embodiments. Therefore, detailed description thereof will not be repeated.
  • an insertion device of a coil further includes a bending measurement instrument 50 .
  • Bending measurement instrument 50 is arranged in lieu of or incorporated in Y connector 131 in which delivery wire 110 is inserted.
  • Bending measurement instrument 50 is a curved pipe having a space 52 at the central area. Delivery wire 110 is inserted into bending measurement instrument 50 while yielding along one wall.
  • delivery wire 110 When compression acts on delivery wire 110 , delivery wire 110 is curved at space 52 in bending measurement instrument 50 .
  • the height h of the mountain of the curve increases in accordance with the bending of delivery wire 110 .
  • a signal representing the bending degree of delivery wire 110 measured by bending measurement instrument 50 is applied to control circuit 30 .
  • Control circuit 30 calculates the insertion force of delivery wire 110 based on the correlation between the bending degree of delivery wire 110 and the compression acting on delivery wire 110 (insertion force of delivery wire 110 ) that is determined in advance.
  • the insertion force of delivery wire 110 can be calculated with favorable accuracy from the bending degree of delivery wire 110 . Accordingly, the insertion force of delivery wire 110 can be controlled with favorable accuracy by feedback control, or the like.
  • a sixth embodiment of the present invention will be described hereinafter.
  • the present embodiment differs from the previous first to fifth embodiments in that delivery wire driving unit 10 and secondary catheter driving unit 20 can be controlled such that delivery wire 110 and secondary catheter 124 are inserted according to manipulation by a surgeon or the like through the usage of master device 60 .
  • the remaining configuration is similar to one of the previous first to fifth embodiments. Therefore, detailed description thereof will not be repeated.
  • the coil insertion device of the present embodiment includes a master device 60 that can be connected to control circuit 30 .
  • Master device 60 controls delivery wire driving unit 10 and secondary catheter driving unit 20 such that delivery wire 110 and secondary catheter 124 are inserted according to manipulation by a surgeon or the like.
  • master device 60 may be connected to delivery wire driving unit 10 and secondary catheter driving unit 20 .
  • Master device 60 includes, for example, a dial type delivery wire manipulation unit 62 and a secondary catheter manipulation unit 64 .
  • Master device 60 controls delivery wire driving unit 10 such that delivery wire 110 is inserted (advanced) and moved back by just a distance according to the rotation of delivery wire manipulation unit 62 .
  • Master device 60 also controls secondary catheter driving unit 20 such that secondary catheter 124 is inserted and moved back by just a distance according to the rotation of secondary catheter manipulation unit 64 .
  • secondary catheter 124 and delivery wire 110 can be inserted according to manipulation by, for example, a surgeon or the like, likewise with a conventional master slave apparatus.
  • the previous first to sixth embodiments may be combined arbitrarily.

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JP2009285150A (ja) 2009-12-10
WO2009144995A1 (fr) 2009-12-03
EP2294988A1 (fr) 2011-03-16
US20110077681A1 (en) 2011-03-31
WO2009144995A8 (fr) 2010-04-08
JP5334035B2 (ja) 2013-11-06

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